Three component polyurethane binder system

• Main Authors: STANCLIFFE MARK, PRIEBE CHRISTIAN, KROKER JOERG, WANG XIANPING
• Format: Patent
• Language: Chinese; English
• Published: 23.01.2018
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS AS ADHESIVES

An organic binder system is mixed with molding material for sand casting in the metals industry. The organic binder system has three parts, the first two of which are conventional and are used in thecold box or no bake process. The third part, which is combined with the first two parts at the time of use, contains at least an alkyl silicate and, optionally, a bipodal aminosilane. In some embodiments, an amount of hydrofluoric acid is included in one or both of the first two parts. Use of the organic binder system provides improved tensile strength in the mold, especially in high relative humidity. 种有机粘合剂体系，混合有用于金属工业中的砂铸的模制材料。该有机粘合剂体系具有三个部分，其中的前两种是常规的并且用于冷芯盒或无烘烤过程中。在使用时与前两部分组合的第三部分至少包括硅酸烷基酯，和可选的双足氨基硅烷。在些实施方式中，前两部分中的种或两者中包括定量的氢氟酸。使用有机粘合剂体系提供模具改善的拉伸强度，尤其是在高相对湿度下。